Reese Witherspoon got her start in Hollywood about 20 years ago and has been a bright spot on the scene ever since. Reese has a lot to smile about these days — she's approaching her four-year marriage anniversary to husband Jim Toth; she has three adorable growing kids; she was nominated for an Oscar for 2014's Wild; and she has a new movie with Sofia Vergara. Perhaps most exciting of all, Sunday was her 39th birthday! While hitting award shows and red carpets and meeting up with her famous friends, Reese has turned on her infectious grin, and her ear-to-ear smile is sure to make you crack a grin, too. Keep reading to see her smiley moments, and then relive her memorable performance in Legally Blonde.